HSM Electronic Protection Services Inc., Lisle, Ill., named Timothy Roberts to its executive account management team as senior national accounts manager for HSM’s west national account region. Roberts has 23 years of experience in the electronic security industry.

The company also named Diana Ziomek to its management team as director of national account customer support. Ziomek will lead a corporate support team responsible for the centralization of national account service work, order processing and specialized service billings. Ziomek has more than 19 years of experience in the electronic security industry.

In other news, HSM relocated its Dublin, Ohio office to Columbus, Ohio.

Raven Electric, Anchorage, Alaska, an electrical and security operation, announced a product distribution agreement with Pacom Systems, Sarasota, Fla., that will introduce a new series of integrated alarm, access control and video surveillance products to its customers. Raven is a statewide firm with more than 20 years in the electrical and security business.

Pacom offers physical security products and security management systems that integrate with all types of third-party security, access control, and video products to create solutions for single and multi-site organizations. Pacom is a Securitas Systems company.

S2 Security Corp., Wellesley, Mass., announced the opening of its Midwestern regional sales office. The office, located in the greater Chicago area, is the fourth opened by S2 in the past year.

Paul Williams will manage the Midwest sales office. The office joins domestic offices in the Boston and San Francisco areas and the international sales office in greater London.